Authorization Bypass Through User-Controlled Key Affecting keycloak-fips package, versions <26.6.3-r0


Severity

Recommended
0.0
high
0
10

Snyk's Security Team recommends NVD's CVSS assessment. Learn more

Threat Intelligence

EPSS
0.26% (18th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications

Snyk Learn

Learn about Authorization Bypass Through User-Controlled Key vulnerabilities in an interactive lesson.

Start learning
  • Snyk IDSNYK-MINIMOSLATEST-KEYCLOAKFIPS-17330757
  • published13 Jun 2026
  • disclosed20 May 2026

Introduced: 20 May 2026

NewCVE-2026-9087  (opens in a new tab)
CWE-639  (opens in a new tab)

How to fix?

Upgrade Minimos:latest keycloak-fips to version 26.6.3-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream keycloak-fips package and not the keycloak-fips package as distributed by Minimos. See How to fix? for Minimos:latest relevant fixed versions and status.

A flaw was found in Keycloak. The cross-session verification proof is keyed only by (local userId, idpAlias) and is not bound to the upstream identity that was actually verified, so a second upstream account on the same IdP can consume it and get linked to the victim's local account.

CVSS Base Scores

version 3.1